port monitoring

[mike dodson <mikejd208 () gmail com>]

I would like to monitor for a few days anything going out on any port other
than port 80 or port 443.  is there a simple display filter that I can use
to see this information.  I am new and still learning some of the simple
stuff.  The reason for doing this is so that I can right a firewall rule to
block all ports but what is needed.
thank you for all the help.

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